A Houston-area woman was killed and her husband was severely injured when weather caused a tree branch to fall on the family's tent at an east Texas campground Saturday.

The couple and their three children, from Mont Belvieu, were staying at the Brushy Creek Campground northeast of Longview when extreme thunderstorms and high winds came through the area, the Marion County Sheriff's Office said in a release.

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The wind blew down a large tree, which struck Mary Pinney, 40, killing her. The three children in the tent were not injured, the sheriff's office said.

Pinney was the volunteer chief operating officer for Project Blue, a nonprofit organization that raises money to help police officers fund treatment for illnesses and injuries sustained outside police duty, said Kelly Bomersbach, a representative of the organization.

Bomersbach said Pinney was one of the driving forces behind the organization, which is based in Mont Belvieu.

"She was definitely a force to be reckoned with," Bomersbach said.

The sheriff's office said other people suffered minor and moderate injuries at the campground, which was full for the start of spring break. An exact number of injuries was not provided.

Numerous power lines were downed in the area, and roads were blocked by fallen trees and debris. Debris cleanup and damage assessment will continue for several more days, along with removal of the numerous damaged RV's and vehicles.

Bomersbach said Pinney's husband remains in intensive care. Funeral arrangements for Pinney have not yet been determined.